The theory and design of the balanced converter , fin - line waveguide bandpass filter , waveguide to microstrip transition and millimeter - wave amplifier are studied in this paper . finally the paper presents the structure and the simulated result of each module 本文对组件中的平衡上变频器，鳍线波导带通滤波器，波导微带转换结构以及毫米波信号放大器的原理和设计进行了讨论，并给出了电路结构，仿真结果。
To date , most research on cmos rf circuits is focused on cmos rf front - end including some key building blocks such as low - noise amplifier ( lna ) , mixer , bandpass filters , voltage control oscillators and power amplifiers . in si rf 1c , inductors need be realized on a silicon substrate along with all of the other devices in a single chip . in fact , the need for high q integrated inductors in rfics is increasing 在无线通信技术对cmos射频集成电路需求的大背景下，本论文在大量深入调研的基础上，围绕射频集成电路中必不可少的、有多种应用的无源器件?硅集成电感及其相关的cmos射频集成单元电路，先后在上海冶金所微电子分部工艺线上及利用上海市科委的多目标芯片项目( mpw )在无锡华晶上华半导体有限公司进行了大量的实验研究，得到了一些新的结果。
As an essential component in modern wireless communication systems , rf bandpass filter has attracted more and more attention and got many achievements too and became smaller and smaller . in this thesis , some research of the design methods and new structures , techniques and miniaturization of bandpass filter in wireless communication systems are proposed . the dissertation mainly including below main content firstly , introduces the history of the filter , elementary theory of microstrip transmission line , network theory , the elementary theory and design methods of the filter 而带通滤波器作为其中的一个重要器件其相关技术也得到了广泛而深入的研究和长足的发展,尤其是向着小型化发展。本文就微带带通滤波器的设计方法、新的结构和滤波器的小型化进行了分析和研究。论文的主要包括以下主要内容:首先,简述了滤波器的发展历史,介绍了微带传输线基本理论、网络理论和滤波器的基本理论与设计方法。
Experiments show that , when use msp430f149 audio sensor to identify vehicles that contain plane , tank , truck and so on by time domain features and two - level f - ratio , the recognition rate is 82 . 1 % ; when use both msp430f149 audio sensor and arm9 sensor to identify vehicles , and the recognition rate is much better than the original system and msp430f149 audio sensor . line spectrum of power spectra and 3 / 2 spectrum is used as frequency features on arm9 sensor , and it is caught by narrow - band bandpass filter 实验证明,在主频为8mhz的msp430f149感知器上,采用基于时域特征和二阶f比的识别算法,能够实时地完成对飞机、坦克、卡车等交通工具的识别;将msp430f149感知器与基于arm9的高端感知器配合使用,且高端感知器采用功率谱线谱或3 / 2维谱线谱作为频域识别特征,能够实时的对各类交通工具做更高性能的识别。
Based on the structure of all optical active fiber ring resonator , dual - tunable er3 + - doped optical fiber ring resonator filter is investigated by adding a tunable bandpass filter to change its wavelength . its finesse can also be tunable by adjusting the pump power . the wavelength tuning range of the dual - tunable fiber ring resonator filter is 39nm , from l526nm to l565nm 在基于掺铒光纤环形腔结构基础之上，通过在腔中加入的可调谐介质薄膜滤波器来选择滤波波长，并通过调节泵浦功率来改变腔精细度，以实现一种滤波波长以及精细度双可调谐的光纤环形腔结构窄带滤波器。
The main work of the system can be divided into four main parts as the following : ( 1 ) 10 . 5ghz bandpass filter the main contradiction of filter is caused by its function of dividing frequencies . in order to properly divide frequencies , not only need passband ’ s attenuation to be as small as possible and stopbands ’ as big as possible , but also need a sharp and quick change between the attenuation of passband and stopband , thus to make their diversity obvious 这四个功能模块分别是: (一) 10 . 5ghz带通滤波器滤波器的主要矛盾是由它分隔频率的功能决定的,为了使分隔理想,一方面要求通带的衰减尽可能小,阻带衰减尽可能大,亦即通带和阻带的衰减差值要尽量大;另一方面要求通带和阻带之间衰减的变化应尽可能快,最好是陡峭的跳变,使阻带和通带的分隔十分明显。
We introduced particularly a series of methods for improving reliability , disturbance resistance , scanning scope and location precision , such as : using modulate laser , designing bandpass filter , zooming out signals and using a special circuit to get rid of disturbances . after that , the effective signals enter into the spring - circuit and touch off it , then the data register lock the codes , so the codes are read into single chip and are sent to the computer for the location . finally , many experiments about disturbance resistance , scanning scope and location precision have been done 为了提高导航定位系统的可靠性、抗干扰性、扫描范围及定位精度，使其具有良好的稳定性，而采取了一系列技术措施，包括：采用调制激光信号；设计带通滤波器和信号的整形处理电路；采用门限技术剔除干扰；并采用单片机系统对采集到的各类信号进行综合处理与管理；建立了基于合作路标的位置计算方法和数学模型，实时通过串行通讯送到上位机，以便上位机对数据进行处理，从而进行定位计算。
Two kinds of filters are presented : by transferring the conventional waveguide cavity filter to the siw , a narrow bandstop filter is designed and simulated , get characteristic of narrow - band bandstop filtering . for example , relative bandwidth 1 . 2 % , most attenuation of 48db in band . electromagnetic bandgap ( ebg ) structures present “ forbidden band ” characteristics , siw features high - pass characteristics , so bandpass filters can be composed by combing ebg and siw 本论文提出了两种基片集成波导滤波器结构:将传统的腔体滤波器概念运用于基片集成波导结构,设计出了一种窄带带阻滤波器,对其进行仿真,得到了窄带带阻滤波特性,如相对带宽为1 . 2 % ,最大衰减为48db 。
In the fifth chapter , the performance of transconductor - capacitor ( gm - c ) continuous time filter is discussed . due to process variation and parasitics , an automatic tuning is designed for center frequency and quality factor q . also , in this chapter , a two order bandpass filter with tunable is designed . the effects on filter ' s performance of the non - idealities of a cmos ota are studied and the computer simulations at the mos transistor level are carried out 第五章讨论了跨导电容连续时间滤波器的性能特点，设计了一个中心频率可调的二阶带通滤波器，为了使滤波器参数自动调整到设计标准值，从而保持其设计值的实现精度，论文给出了片内自校正(可调谐)环节。
Also discussed the methods on how to realize the cwt both in time - domain and frequency - domain and how to design the gm - c bandpass filter used in realization of cwt . in order to optimize the performance of gm - c filter , linearization techniques are investigated and proposed . due to process variation and parasitics , an automatic tuning is designed for center frequency / 0 and quality factor q also , in this thesis , 16 - channel analogue cmos cwt circuit has been realized 论文围绕连续小波变换的模拟电路实现这一热点问题，讨论了连续小波变换的时域和频域实现方法；具体分析了并行结构与串行结构的优缺点；研究了频域法中的跨导-电容带通滤波器的设计；给出了改善跨导输入级传输特性的线性程度并扩大线性范围的具体方法；设计了片内自校正(可调谐)环节使滤波器参数自动调整到设计标准值；最后给出了16通道滤波器组实现小波变换的方法。
